When Gitanjali Rao shared how she likes “finding solutions to real problems”, it was hard to imagine this dynamic 11-year-old girl could settle a problem that has escaped scientists for years.
In just three months, Rao came up with a device（装置）that can replace the costly and lengthy tests currently used to reliably determine lead levels in our fresh water. Inspired by the current litigation （诉讼）in Flint, Michigan, a case of water pollution from 2014 to 2015, Rao designed a new testing system that resulted in her being named America’s Top Young Scientist for 2017.
Rao had been following the water problem for about two years. She was amazed by the number of people affected by lead pollution in water and wanted to do something to change this. Gitanjali spent months trying to convince local high schools and colleges to give her lab time to continue her experiment. At home, Gitanjali worked on her project in the “science room” she asked her parents to create for her. Rao has created a device that uses three parts: a cartridge, a Bluetooth reader and an app. To put it simply, the cartridge contains carbon nanotubes（纳米管） that react to lead. This reaction is then registered by the Bluetooth reader, which sends a signal to a mobile app that can tell you immediately if your water is safe to drink.
Rao appropriately named the device Tethys after the Greek goddess of fresh water, and is hoping to make a little improvement to get the device on the market. While we may not be aware of any lead pollution present in our aging pipelines, lead poisoning can cause delays in physical and mental development. With Rao believing that the “purpose of science is to make a difference”, her incredible invention could make a difference to millions of people in the United States.
1.What do we know about Rao’s device?
A. It’s cheap and quick.
B. It’s cheap and inaccurate.
C. It’s expensive and reliable.
D. It’s portable and time-consuming.
2.What made Rao have the idea of designing the device?
A. Her parents’ suggestions.
B. The name of the Greek goddess.
C. Her interest in settling real problems.
D. The water pollution litigation in Flint.
3.What do the carbon nanotubes function as?
A. Sending immediate signals.
B. Recording the reaction results.
C. Detecting the presence of lead.
D. Showing the water quality results.
4.What does the author think of Rao’s invention?
A. It will lead Rao to make a fortune.
B. It will help millions of Americans drink safe water.
C. It will promote the development of science in America.
D. It will soon settle the lead-polluted problem thoroughly.
If you’re new to San Francisco, paying the city a visit, or simply looking for a new playground for you and your dog, here are four of the finest dog parks in San Francisco.
◆ Corona Heights Dog Park
Often visited by residents from all over the city because of its nearness to the Randall Museum, Corona Heights
Dog Park offers pets and owners breathtaking views, after a steep hillside climb, and a fenced dog area that allows dogs to let loose without a leash（狗链）. Owners will also enjoy the playground, tennis courts and basketball courts.
◆ Dolores Dog Park
The grounds of Dolores Park once served as camps for those who were left homeless by the 1906 earthquake, but now often visited by crowds of Mission District people. Four-legged friends can also wander about carefree off-leash while making friends with other members of the doggie community.
◆ Pine Lake Dog Park
Noteworthy for its place as a rest stop for hundreds of species of birds to fly to and from warmer climates, Pine Lake Park is also prized by city dogs and their owners for their nice hiking paths, picturesque lake suited for swimming, and an off-leash area on the park's west end that lets dogs run free.
◆ Buena Vista Dog Park
At 146 years young, Buena Vista Park is San Francisco’s oldest park. Dogs and owners with plus energy will love burning it on this park’s steep paths and winding staircases. Dog owners should have good control over their dogs, as it’s quite easy for dogs to get separated when going through Buena Vista’s many twists and turns.
1.Why do dog owners take their pets to Dolores Dog Park?
A. To let them socialize. B. To give them rescue lessons.
C. To help them lose weight. D. To increase their physical activities.
2.Which dog park is popular with bird lovers?
A. Corona Heights Dog Park. B. Dolores Dog Park.
C. Pine Lake Dog Park. D. Buena Vista Dog Park.
3.What is special about Buena Vista Dog Park?
A. It is suitable for swimming. B. It is close to a museum.
C. Dogs must be on a leash. D. Dogs can go climbing.
目前，你校有许多学生因为各种原因很少参加体育锻炼。假定你是张华，请你就此事向你校英语报写一封信，倡导同学们积极参与体育锻炼。
内容包括：
1. 学生们不参加体育活动的原因；
2. 进行体育活动的好处。
注意：
1. 词数100左右；
2. 可以适当增加细节，以使行文连贯；
3. 文章开头和结尾语已给出，不计入总词数。
Dear schoolmates,
Nowadays, most students don’t do sports for kinds of reasons.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours sincerely,
Zhang Hua
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1.答案应写在答题卡上
2 每处错误及其修改均仅限一词；
3. 只允许修改10处，多者（从第11处起）不计分。
We’re living in a world where we can never stress the important of sharing too much.By sharing,we can often great reduce our sadness and double our happiness.
When it came to this topic,memories flood into my mind.There was a time when I caught in the sadness of not passing an important exam.My world turned gray and I didn’t feel interested in something until my best friend came up to comfort me.Encouraged and moved by his kindness,I shared my trouble with him,that relieved me soon.Little by little I regained my confidence.The followed months witnessed my efforts,and I finally made a great progress in other important exams.
As you can see,which was sharing with my friend that helped me out of that dark time and bring back my confidence.Sharing is beautiful,not only physically but also mentally.
Have you complained 1.your family, your boss, or even your life? Maybe everyone has, but after reading this story, you may change your view and treat the world with another attitude.
An ass (驴),2.(belong) to an herb-seller who gave him too little food and too much work, could not bear the life any longer. So he made a request to God, to be released from his present service and provided with3.master. After warning him4.he would regret doing it, God made him to be sold to a tile-maker. Shortly afterwards, the ass found that he had 5.(heavy) loads to carry and harder work in the brick-field, and asked for another change again. God, telling him that it would be6.last time that he could satisfy his request, made him sold to a tanner (皮革工). The ass found that he7.(fall) into worse hands. Knowing his new master’s occupation, he said, “It would have been better for me either to have been starved by the first owner 8. to have been overworked by the second. But now I have already been bought by my present owner,9.will peel off my skin even after I am dead, and make me useful .”
We can see that people with dissatisfaction in a place are not10.(like) to find happiness in another.
Running for a Dream
I will never forget that November day．It was hotter than normal．This was the ________ my father and I had waited so long for，because we had been working towards this race for three years．Dozens of familiar faces from church and school flashed across my view．They had come ________me．I saw worry and ________on my father's face．Then the race began!
For the first two and a half miles．I felt________．I had never before been so ready for something．The weeks leading up to the race were filled with controlled________and a strict diet．My friends hadn't seen me in weeks，but they understood the _______required to make my dream a reality．As in all of my races，I didn't _______ out in the front，I loved the pleasure of passing people as my strength overtook their premature speed．
Then without warning，my strength began to decrease．Neck and neck with one of my greatest competitors，I ________see the finish line．I had begun the final dash into_______when my knees became weak and my legs gave way．Nothing I could do would make them _______ weight．
I watched as runners rushed by me．________ I knew my dreams of victory were destroyed．I had to finish the race．However，my legs hurt badly．With all of the ________ left in me，I got on my hands and knees and crawled （爬），inch by inch，across the finish line．Voices，both ________ and familiar，cheered me on．They gave me the courage to keep ________until the very end．
The doctors were there in seconds，but my eyes searched the crowd for him．There was only one person I wanted to ________to．I whispered，"I'm so sorry，Dad，I'm so sorry I ________you．"He looked at me，saying，"You could never disappoint me．Sometimes these things just ________．All that matters is that you did your best．"
"But we worked so ________．What about our dream？"He reached over for my hand and said，"Don't you know that you are my dream and it has come true？"
It wasn't long before my running shoes were back on，marking a________path for my journey，I learned that all of the miles，the tears，the sweat，and the pain my dad and I experienced together were not for a________．What I realized，though，was that to him，I was the greatest prize he had ever won．
1.A. dream B. weather C. result D. day
2.A. for B. to C. across D. over
3.A. coldness B. astonishment C. excitement D. amusement
4.A. proud B. great C. nervous D. afraid
5.A. programs B. studies C. instructions D. practices
6.A. sacrifice B. potential C. patience D. attention
7.A. look B. move C. start D. come
8.A. should B. could C. must D. need
9.A. relief B. spirit C. pleasure D. glory
10.A. give B. feel C. hold D. add
11.A. Where B. Because C. If D. Although
12.A. trust B. emotion C. strength D. confidence
13.A. loud B. foreign C. soft D. firm
14.A. going B. running C. fighting D. training
15.A. refer B. talk C. listen D. agree
16.A. frightened B. disturbed C. disappointed D. bored
17.A. develop B. change C. follow D. happen
18.A. late B. hard C. closely D. quickly
19.A. new B. near C. rough D. narrow
20.A. wish B. duty C. rank D. race
